2.1) Assuming a uniform expansion of the universe, the Cosmic Microwave Background (CMB) radiation has cooled down to approximately 2.7 Kelvin. If we consider the original temperature of the CMB to be around 3000 Kelvin when it was emitted, calculate the redshift factor (z) for the CMB. Use the formula: Toriginal 1+z= Tcurrent where Toriginal is the original temperature and Tcurrent is the current temperature of the CMB.